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GNSS信号模拟器通道群时延标定方法

李世光 寇艳红 杨军 王伟

李世光, 寇艳红, 杨军, 等 . GNSS信号模拟器通道群时延标定方法[J]. 北京航空航天大学学报, 2015, 41(12): 2328-2334. doi: 10.13700/j.bh.1001-5965.2015.0007
引用本文: 李世光, 寇艳红, 杨军, 等 . GNSS信号模拟器通道群时延标定方法[J]. 北京航空航天大学学报, 2015, 41(12): 2328-2334. doi: 10.13700/j.bh.1001-5965.2015.0007
LI Shiguang, KOU Yanhong, YANG Jun, et al. Group delay calibration method for GNSS signal simulator channel[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(12): 2328-2334. doi: 10.13700/j.bh.1001-5965.2015.0007(in Chinese)
Citation: LI Shiguang, KOU Yanhong, YANG Jun, et al. Group delay calibration method for GNSS signal simulator channel[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(12): 2328-2334. doi: 10.13700/j.bh.1001-5965.2015.0007(in Chinese)

GNSS信号模拟器通道群时延标定方法

doi: 10.13700/j.bh.1001-5965.2015.0007
基金项目: 国家自然科学基金(61271197)
详细信息
    作者简介:

    李世光(1988-),男,河南南阳人,博士研究生,lsgruc@163.com

    通讯作者:

    寇艳红(1969-),女,河南禹州人,副教授,buaakyh@126.com,主要研究方向为卫星导航、无线通信和数字信号处理技术.

  • 中图分类号: V448.25+3

Group delay calibration method for GNSS signal simulator channel

  • 摘要: 传统的全球导航卫星系统(GNSS)信号模拟器通道群时延标定方法有相位翻转点法和相关峰法两种,两者均在零伪距或固定伪距的特殊仿真场景下进行测量,且在通道传输特性非理想的情况下测得的群时延均存在偏差.提出了基于闭环伪距测量的模拟器通道群时延标定方法,并设计实现了GNSS信号模拟器通道群时延标定系统.首先,采用高速直接射频采样存储系统对模拟器正常星座动态仿真场景下输出的导航信号和秒脉冲(1 PPS)信号同时进行记录.其次,使用软件接收机对信号进行捕获跟踪,利用三次样条插值判定1 PPS上升沿位置作为伪距观测历元时刻,对软件接收机的伪距观测量和模拟器仿真的伪距记录值做数据比对,得到模拟器的群时延标定值.最后,分别利用上述方法对两种商用模拟器的群时延进行了标定,实验结果表明,闭环伪距测量法有效可行,测量不确定度优于0.7 ns.

     

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出版历程
  • 收稿日期:  2015-01-04
  • 修回日期:  2015-01-23
  • 网络出版日期:  2015-12-20

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